Heating system types
8
Circuit Diagram 1
Single-boiler system with Therm-Control and three-way mixing valve
in conjunction with Vitorond 200, VD2A
A
Heating circuit with mixing valves
B
DHW tank
Plug
!
Outdoor temperature sensor
?
M2
Flow temperature sensor,
mixing valve
?
M3
Flow temperature sensor,
mixing valve
§
Boiler water temperature
sensor
%
DHW tank temperature sensor
aJ
A
Therm-Control temperature
sensor
sÖ
M2
Heating circuit pump, mixing
valve
sÖ
M3
Heating circuit pump, mixing
valve
sÖ
A1
Closing the mixing valves with
external heating circuit control
units
sA
DHW primary pump
sK
DHW circulation pump
fÖ
Power supply, 120 VAC
60 Hz
Install the main isolator in
accordance with regulations
fA
Burner (stage 1)
gS
M2
Mixing valve motor
gS
M3
Mixing valve motor
lÖ
Burner
(burner stage 2 / mod.)
aVD
/
aVH
External connections
Please refer to the control
manual Vitocontrol-S,
VD2/CT3.
5285
941
-
0
1
